diff --git a/tmux-mem-cpu-load.plugin.zsh b/tmux-mem-cpu-load.plugin.zsh
index a6f18cc..47e0b73 100644
--- a/tmux-mem-cpu-load.plugin.zsh
+++ b/tmux-mem-cpu-load.plugin.zsh
@@ -1,4 +1,19 @@
-# vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
+ # vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
+ #
+ # Copyright 2012 Matthew McCormick
+ # Copyright 2015 Pawel 'l0ner' Soltys
+ #
+ # Licensed under the Apache License, Version 2.0 (the "License");
+ # you may not use this file except in compliance with the License.
+ # You may obtain a copy of the License at
+ #
+ #     http://www.apache.org/licenses/LICENSE-2.0
+ #
+ # Unless required by applicable law or agreed to in writing, software
+ # distributed under the License is distributed on an "AS IS" BASIS,
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ # See the License for the specific language governing permissions and
+ # limitations under the License.
 
 if [ ! -s /usr/local/bin/tmux-mem-cpu-load ];
 then